Old or new, in fact, he is closing his clubface in relation to his path (which surely will be in-to-out taking into account his palallelly closed stance) and his ball must draw in such scenario. Apparently, his clubface during a speed real motion will not be delivered so closed as at address because it may always tend to be squarish at impact and alongside overall path as in case of all good players.
The so called old ball flight rules are precisely wrong but have the most important issue correct, i.e. face closed to projected path in case of draws and open in case of fades. The rest is practice or subconscious, I guess.
Cheers